Wednesday, June 27, 2012

Possible Nova in Sgr - J17522579-2126215

Following the posting on the Central Bureau's Transient Object Confirmation Page about a possible Nova in Sgr (TOCP Designation: J17522579-2126215) we performed some follow-up of this object remotely through the 0.10-m f/5 reflector + CCD of ITelescope network (MPC Code - H06). 

On our images taken on June 27.3, 2012 we can confirm the presence of an optical counterpart with R-filtered CCD magnitude 8.9 at coordinates:

R.A. = 17 52 25.79, Decl.= -21 26 21.6

(equinox 2000.0; CMC-14 catalogue reference stars).

 Our annotated confirmation image. Click on it for a bigger version:

An animation showing a comparison between our confirmation image and the archive POSS2/UKSTU plate (R Filter - 1996). Click on the thumbnail below:

UPDATE - July 08, 2012

According to Cbet 3156, this variable has been designated NOVA SAGITTARII 2012 No. 3. This nova was discovered by K. Itagaki (Yamagata, Japan) on an unfiltered CCD image taken on June 26.5494 UT with a 0.21-m reflector (mag 10.3). Spectra obtained by different observers (K. Imamura; H. Maehara; C. Buil; U. Munari) suggests that this nova is of theHe/N type, with hydrogen Balmer and He I in strong emission.

Spectrum by K. Imamura (OUS)

by Ernesto Guido, Giovanni Sostero & Nick Howes

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